SN74LS273N Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
The Texas Instruments SN74LS273N is an 8-bit D-type flip-flop IC from the LS logic family in a 20-pin DIP package. It operates at up to 30MHz maximum frequency with a 15pF load capacitance and features a master reset function. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- SN74LS273N Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 8-bit D-type flip-flop with master reset for simultaneous clearing of all registers
- Maximum operating frequency of 30MHz supporting high-speed digital data latching applications
- LS logic family with 15pF load capacitance for compatibility with standard TTL and CMOS logic
- 20-pin DIP package (PDIP) enabling easy breadboard prototyping and through-hole PCB assembly
- RoHS-compliant Pb-free construction (JESD-609 e4) for environmentally compliant designs
Applications
The SN74LS273N is widely used in digital systems as an 8-bit data register for latching parallel data buses in microprocessor interfaces, memory address latches, and I/O port buffers. Its synchronous clocking and asynchronous master reset make it a reliable choice for data buffering in control systems, industrial automation equipment, and legacy digital circuit designs.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Family | LS |
| JESD-30 Code | R-PDIP-T20 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 15pF |
| Logic IC Type | D FLIP-FLOP |
| Max Frequency@Nom-Sup | 30000000Hz |
| Max I(ol) | 0.008A |
| Number of Bits | 8 |
| Number of Functions | 8 |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP20,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Packing Method | TUBE |
| Power Supply Current-Max (ICC) | 27mA |
| Prop. Delay@Nom-Sup | 27ns |
| Propagation Delay (tpd) | 27ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.25V |
| Supply Voltage-Min (Vsup) | 4.75V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | NO |
| Technology | TTL |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Trigger Type | POSITIVE EDGE |
| fmax-Min | 35MHz |
| Package | Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
| Country of Origin | Malaysia |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SN74LS273N:
Flip-Flop, LS Series, 8-Func, Positive Edge Triggered, 8-Bit, True Output, TTL, PDIP20
D Flip-Flop, LS Series, 8-Func, Positive Edge Triggered, 8-Bit, True Output, TTL, PDSO20
Frequently Asked Questions
How many bits does the SN74LS273N store, and what is its maximum clock frequency?
The SN74LS273N is an 8-bit D-type flip-flop capable of storing one byte of data per clock cycle. It supports a maximum operating frequency of 30MHz (30,000,000 Hz), making it suitable for data latching in medium-speed digital systems including microprocessor bus interfaces and I/O port expansion applications.
What package does the SN74LS273N use?
The SN74LS273N comes in a 20-pin PDIP (Plastic Dual In-line Package) package, identified by JESD-30 code R-PDIP-T20. This through-hole package is ideal for prototyping on breadboards and through-hole PCB designs. It is Pb-free (JESD-609 e4) and RoHS compliant for use in modern environmentally regulated applications.
What is the output sink current of the SN74LS273N?
The SN74LS273N has a maximum output low current (I(ol)) of 8mA per output pin. This drive capability is typical for LS-family TTL logic, sufficient for driving standard TTL inputs, indicator LEDs (with current-limiting resistors), and other logic-level loads within the operating specifications of the device.
What are typical applications for the SN74LS273N?
The SN74LS273N is commonly used as a data bus register, output port latch, or address latch in microprocessor-based systems. Its 8-bit width and asynchronous master reset are particularly useful in industrial controllers, embedded systems, and retro computing designs where a simple reliable octal D flip-flop with through-hole package is preferred.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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